At least $400 everywhere else, Dell has the TomTom Go 920T GPS System on sale for $299.99. Along with preloaded maps and voice-guided instructions, the system features a huge 4.3” display, traffic receiver, Bluetooth support, text-to-speech technology, and a built-in FM tuner. Compare this price to $700 at Radio Shack. Shipping is free and sales tax is charged in most states. This model is available without the traffic receiver for $30 less.